When an is raised to Lv. 18, it will evolve into Clefairy. When the evolution ends, it will immediately evolve from Clefairy into a Nidoking. If the B button is pressed simultaneously during its evolution into a Clefairy, it will stay as is. Same goes for the Nidoking; it will stay as a Clefairy. If it evolves into either of these two Pokémon, it will have the same moves as it had when it was an .